Boiler



(No Model.)

C. R. MOORE.

BOILER.

Sme/who@ Nrrnxn 'STATES CHARLES R. MOORE, OF ELMIRA, NEV YORK.

BOILER.

SPECIFICATION forming part 0f Letters Patent NO. 582,216, dated May 1 1,1897'.

I Application filed September 8, 1896. Serial No. 605,069. (No model.)

ATo @ZZ whom it may concer-7L:

Be it known that I, CHARLES R. MOORE, a citizen of the United States,residing at F.1- mira, in the county of Chemung and State of New York,have invented certain new and useful Improvements in Boilers, of whichthe following is a specification.

My invention relates to improvementsin upright boilers of the water-tubetype, and more especially to such as are adapted for steam-iire-enginepurposes, where it is desirable to make steam very rapidly.

The present invention is of the same nature as that described in LettersPatent No. 500,814, granted to me on July 4, 1893; and it consists inproviding the boiler with separate, independent, and disconnectedsystems or sections of water-t ubes, certain of which are connected tothe water-space of the boiler in such a manner as to create acirculation and produce a rapid generation of steam, and one of which islocated centrally, being so arranged and connected as to receive waterfrom the feedpump and deliver it in a heated condition to thewater-space below the normal level thereof, the object being to generatesteam rapidly from the comparatively small amount of water contained inthe water-space and circulating-tubes and to heat the water to theboiling-point in the central tube system or section before delivering itto the waterspace of the boiler.

A further object which I have in view is to so arrange the differentsystems or sections of tubes that any one section maybe readily removedfor the purpose of repairing without disturbing the remaining sections.

I attain these objects by the construction illustrated in theaccompanying drawings, in which- Figure l is a vertical longitudinalsection on the line a; in Fig. 2 of a boiler embodying my invention, thedome, stack, and gratebars being omitted; and Fig. 2, a transversesection of the same on the line y y in Fig. 1.

Similar letters refer to similar parts in the two views.

The body of the boiler is composed of two shells, one within the other.The outer shell a. is straight. The inner shell is of nearly the samediameter as the outer shell at its lower portion b, is bent inwardly atb' about midway the height of the boiler, and runs thence straight up atb to the top of the boiler, where it is joined to the outer shell by theannular head c, thus forming an annular water-leg, water-space, andsteam-space, as indicated. A number of tube sections or nests Cl areshown ranged around the lower portion of the boiler just above thetire-box. These consist of upper and lower heads joined together by anumber of tubes, the lower head being connected with the leg of theboiler and the upper head with the water-space below the level at whichthe water is ordinarily carried. Instead of the nests coils of tubes, asindicated by the broken lines d', may be used for the circulatingmedium, and these coils may be double or triple, accordingly as thespace permits. The style or shape of these circulating-tubes isimmaterial. This leaves a straight cylindrical passage through theboiler, which is filled by the large section or nest of tu bes e. Thissection consists of large headers e and e", joined together by tubes,properly-arranged iiues or passages for the gases of combustion beingprovided through these headers and around the tubes. This section isnearer the diameter of the portion b" of the shell than the drawingsshow it, in order that there shall not be too free a passage for thegases up around the section next to the shell, all the gas-passagesbeing so arranged and proportioned that the gases shall be drawn towardthe center of the boiler as the)T ascend.

The central section may extend down near to the fire-box, as I haveshown it, or not so far, accordingly as circumstances may dictate. Thelower header e is connected with the feed-pipe f, which passes outthrough a hollow stay in the leg of the boiler and is connected with thefeed-pump or other source of supply. The upper header e" is coupled atits center to a casting g, which is provided with a number of offsetsfrom which run` pipes h h through the top of the inner shell into thesteam-space, where they are coupled. by elbows to vertical pipes t' '12,which in turn eX- tend downward through the steam-space to below thenormal water-level in the waterspace.

Suitable hangers are provided for supporting the weight of the sectione, and braces are also provided to hold it against displacement byshocks and vibrations such as are attendant upon a boiler when attachedto a portable nre-engine.

It will readily be seen that any one of the systems or sections of tubesmay be removed without disturbing the rest. Only two joints need bebroken in taking out any section, even to the large central section.Instead of connecting the top header of the central section to theboiler in the manner described, however, I may connect it in the sameway as I do the top section in the boiler described in my patent abovementioned.'

In operation the centra-l section is filled with water and the water-legand circulating sections filled to any desired level. When making veryquick steam, this level may be below the tops of thecirculating-sections. The fire being started, the water in thecirculatingsections is heated first, and when suiicient steam has beengenerated the feed-pump is started, and water from the central section,which has by this time become well heated, is fed in through pipes 7Land fi, the cold water from the feed-pump entering the bottom of thesection first and becoming heated before it reaches the top. There istherefore no drop in steam-pressure due to forcing cold water directlyinto the steam-making water. Vithin a very few minutes after startingthe lire the boiler is steaming rapidly and the central section works inunison with the circulating-sections, delivering heated water to thewater-space lread y for immediate conversion into steam. The tubes andheaders are always filled with water, and there is no danger of leakyjoints or tubes caused by expansion What I claim as my invention, anddesire to secure by Letters Patent, is

l. In an upright boiler, the combination of inner and outer shellsforming an annular water and steam space, an annular series ofcirculating-tubes or nests of tubes connected with the water-space, andan independent central system or nest of tubes extending from the top ofthe boiler down within the series of circulating-tubes, said centralsystem being connected at the bottom with the feedwater supply for theboiler, and at the top with an outlet leading down to, the waterspacebelow the normal water-level.

2. In an upright boiler, the combination of inner and outer shellsforming an annular water and steam space, a casting provided withoffsets located centrally at the top of the boiler, pipes leadingradially out from said offsets and connected with vertical pipes leadingdown to the water-space, and an independent central system or nest oftubes connected at the top with said casting and at the bottom with thefeed-water inlet.

3. In an upright boiler, the combination of inner and outer shellsforming an annular water and steam space, a casting provided withoffsets located centrally at the top of the boiler, pipes leadingradially out from said offsets and passing through the inner shell wherethey are connected by elbows to vertical pipes leading down through thesteamspace to a point below the normal water-level, a central system ornest of tubes connected at the top with said casting and at the bottomwith a feed-water inlet, and a series of circulating-tubes or nests oftubes connected with the water-space in the manner described.

In testimony whereof I have affixed my signature in presence of twowitnesses. y

v CHARLES R. MOORE. XVitnesses:

A. S. DIVEN, IIoLLIs II. MILLS.

